Ini multiline

Introduces the multiline config described in #53 
Yes, basic mounting works, but there seem to be several different issues (not related to ini). I can create tickets as soon as you confirm them:
* bash completion strips the needed `\` in paths, therefore using completion to get a key with `\` in use does not work
* `kdb get` outputs only the first line of the multiline value. When I start the same `kdb get` command from Eclipse (with the Eclipse console) everything works as expected
* METADATA.ini contains keys with the same name several times, but no sections. Therefore only the last key wins